Reviews do not sway me one way or the other to get a game unless they are not very good. The title, tags, videos, pics and description does that for me, maybe scanning a walkthrough or two depending
I'll check reviews depending on what their ratings are just to see what's going on. If it is a game I want from a well known Developer/Publisher that has released good games I will usually just get the game without looking at reviews, Firmament and Amnesia's for example. I also like check out YouTube reviews. You get to see some gameplay during the review which is nice. I will also check out the Discussion Boards if I find a number of reviews having same issues to see what the Dev's have to say. They usually respond fairly quick. I will also check out the "Related News" to a game to see if issues might have an update and if so I will watch reviews to see if they improve before I get it. I do all this only if it is a game I would like to get when reviews are so so
There was this one game that I was gonna get on it's release,
Blade Runner Enhanced, and am glade I didn't. Right off the bat the game was getting bad reviews and still does. This is one case reviews stopped a purchase
EDIT: I would like to add that I too read all flotsam's reviews. Although very good reviews covering many aspects of a game they have not swayed me one way or the other. For me flotsam's reviews carry a lot of interesting info, a story about a game's play so well done